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[SPARK-54623][PYTHON][TEST] Add coverage test for UDTF null checker #53362

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[SPARK-54623][PYTHON][TEST] Add coverage test for UDTF null checker #53362

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5739f1e
Test null checker for UDTF
gaogaotiantian Dec 6, 2025
4dbc939
Fix lint
gaogaotiantian Dec 6, 2025
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105 changes: 105 additions & 0 deletions python/pyspark/sql/tests/test_udtf.py
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Original file line number Diff line number Diff line change
Expand Up @@ -812,6 +812,111 @@ def _check_result_or_exception(
with self.assertRaisesRegex(err_type, expected):
func().collect()

def test_udtf_nullable_check(self):
for ret_type, value, expected in [
(
StructType([StructField("value", ArrayType(IntegerType(), False))]),
([None],),
"PySparkRuntimeError",
),
(
StructType([StructField("value", ArrayType(IntegerType(), True))]),
([None],),
[Row(value=[None])],
),
(
StructType([StructField("value", MapType(StringType(), IntegerType(), False))]),
({"a": None},),
"PySparkRuntimeError",
),
(
StructType([StructField("value", MapType(StringType(), IntegerType(), True))]),
({"a": None},),
[Row(value={"a": None})],
),
(
StructType([StructField("value", MapType(StringType(), IntegerType(), True))]),
({None: 1},),
"PySparkRuntimeError",
),
(
StructType([StructField("value", MapType(StringType(), IntegerType(), False))]),
({None: 1},),
"PySparkRuntimeError",
),
(
StructType(
[
StructField(
"value", MapType(StringType(), ArrayType(IntegerType(), False), False)
)
]
),
({"s": [None]},),
"PySparkRuntimeError",
),
(
StructType(
[
StructField(
"value",
MapType(
StructType([StructField("value", StringType(), False)]),
IntegerType(),
False,
),
)
]
),
({(None,): 1},),
"PySparkRuntimeError",
),
(
StructType(
[
StructField(
"value",
MapType(
StructType([StructField("value", StringType(), False)]),
IntegerType(),
True,
),
)
]
),
({(None,): 1},),
"PySparkRuntimeError",
),
(
StructType(
[StructField("value", StructType([StructField("value", StringType(), False)]))]
),
((None,),),
"PySparkRuntimeError",
),
(
StructType(
[
StructField(
"value",
StructType(
[StructField("value", ArrayType(StringType(), False), False)]
),
)
]
),
(([None],),),
"PySparkRuntimeError",
),
]:

class TestUDTF:
def eval(self):
yield value

with self.subTest(ret_type=ret_type, value=value):
self._check_result_or_exception(TestUDTF, ret_type, expected)

def test_numeric_output_type_casting(self):
class TestUDTF:
def eval(self):
Expand Down